Coined by the Liverpool Science Fiction Society in 1955 at the Cytricon convention held in the George Hotel, Kettering, Northamptonshire. It was used as the fake sponsor of an audio play and fake advertisements were placed around the hotel; an actual drink was later served at the hotel bar after customers asked for it.

The waitress sized me up and evidently my aura met with her approval because she came over, smiled the smile of professional waitresses and left a mimeographed drink list. I had no time to be surprised by the list, which included selections such as Xeno, Blog, Grog, Nuclear Fizzes, "Smoooooth" Jack Daniels, India Pale Ale and Bheer (Home Brew 25¢ extra) because it was at this point that my old friend Ichabod wandered up.

1997 February 23, Don Fitch, “Fan Drinking (Was Re: The Death of the SF Bestseller?...)”, in rec.arts.sf.fandom, Usenet‎[3], message-ID <19970223083900.DAA05871@ladder02.news.aol.com>:

That doesn't explain why I haven't seen anyone objectionably drunk at Minicons over the past five or six years. There's generally kegs of three or more different and excellent micro-brewery beers in the consuite, along with Blog (which is alcoholic by definition, when unmodified), and other alcoholic drinks are available at a dozen or more of the open room parties.